<template>
<!--  主要布局-->
  <el-container class="home-container">
<!--    头部区域-->
    <el-header>
      <div>
        <img src="../assets/商标.jpg" alt="">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
<!--    压面主体区域-->
    <el-container>
<!--      侧边栏-->
      <el-aside :width="isCollapse ? '64px':'200px'">
          <div class="toggle-button" @click="toggleCollapse">
            |||
          </div>
<!--        侧边栏菜单区域-->
          <el-menu background-color="#333744"
                   text-color="#fff"
                   active-text-color="#409EFF"
                   unique-opened
                   :collapse="isCollapse"
                   :collapse-transition="false"
                   router
                   :default-active="activePath">
<!--            一级菜单-->
            <el-submenu :index="item.id+''"
                        v-for="item in menulist" :key="item.id" >
<!--              一级菜单模板区域-->
              <template slot="title">
<!--                一级菜单图标-->
                <i :class="iconsObject[item.id]"></i>
                <span>{{item.authName}}</span>
              </template>

<!--              二级菜单-->
                <el-menu-item :index="'/'+child.path+''"
                              v-for="child in item.children"
                              :key="child.id"
                              @click="saveNavState('/'+child.path+'')">
                  <template slot="title">
                    <i class="el-icon-menu"></i>
                    <span>{{child.authName}}</span>
                  </template>
                </el-menu-item>


            </el-submenu>
          </el-menu>



      </el-aside>
<!--      右侧内容主体-->
      <el-main>
<!--        路由占位符-->
        <router-view></router-view>
<!--        <router-link to=""></router-link>-->
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
  export default {
    name: "home",
    data(){
      return{
        //左侧菜单数据
        menulist:[],
        iconsObject:{
          '125':'el-icon-s-custom',
          '103':'el-icon-s-check',
          '101':'el-icon-s-grid',
          '102':'el-icon-s-platform',
          '145':'el-icon-upload'
        },
        //是否折叠
        isCollapse:false,
        //被激活的链接地址
        activePath:''
      }
    },
    //被创建时执行的生命周期函数
    created(){
      this.getMenuList()
      this.activePath = window.sessionStorage.getItem('activePath')
    },
    methods:{
      logout(){
        /*清除sessionStorage信息，强制跳转到登录页面*/
        window.sessionStorage.clear();
        this.$router.push('/login');
      },
      /*调用menus接口获取数据*/
      async getMenuList(){
        const {data:res} = await this.$http.get('menus')
        if(res.meta.status !=200)
          return this.message.error(res.meta.msg)
        this.menulist = res.data
        // console.log(res)
      },
      //点击按钮，切换菜单的折叠与展开
      toggleCollapse(){
        this.isCollapse = !this.isCollapse
      },
      //保存链接的激活状态
      saveNavState(activePath){
        window.sessionStorage.setItem('activePath',activePath)
        this.activePath = activePath
      }
    }
  }
</script>

<style lang="less" scoped>
  .home-container{
    height:100%;
  }

  .el-header{
    background-color: #373d41;
    display:flex;
    justify-content: space-between;
    padding-left: 0;
    align-items:center;
    color:#fff;
    font-size:20px;
    img{
      max-width: 90px;
    }
    >div{
      display: flex;
      align-items:center;
      padding-left: 10px;
    }
  }

  .el-aside{
    background-color: #333744;
    /*width: 200px;*/
    .el-menu{
      border-right: none;
    }
  }

  .el-main{
    background-color: #EAEDF1;
  }
  
  .iconfont{
    margin-right:10px;
  }

  .toggle-button{
    background-color: #4A5064;
    font-size: 10px;
    line-height:24px;
    color:#fff;
    text-align:center;
    letter-spacing:0.2em;/*字体间间距*/
    cursor:pointer;
  }

  .el-submenu{
    padding-right:30px;
  }
</style>